EP0446780B1 - Toe piece binding - Google Patents

Abstract

The toe piece binding (1) has a support bearing (13) which is mounted rotatably in lateral bearing blocks (7), fixed to the ski, and on which the ski boot (14) rests with positive fit in the touring position. To achieve this positive fit, the boot sole has a recess (22) which is matched to the support bearing (14) constructed as a straight shaft, and in which the support bearing fits. Serving for fastening the boot on this support bearing is a tightening lever (9) which is mounted so as to be swivellable by means of tensioning struts (8) and has at its one end a pressure piece (10) which presses onto the projecting edge of the boot sole (11) in its closed position in which the tightening lever is in an after-dead-centre position. For downhill skiing, the boot is placed directly on the ski and the tightening lever (9) is swivelled below the support bearing (13) and has at its end opposite the pressure piece (10) a holding-down device (12) for the sole which grips over the upper sole edge in the downhill skiing position. In order that the tightening lever mounted so as to be swivellable on the tensioning struts cannot escape upwards, it is held by the support bearing (13), below which it is swivelled for the downhill skiing position. <IMAGE>

Description

The invention relates to a front sole holding device according to the preamble of claim 1.

A front sole holding device is already known (EP-A-0 152 629) which is suitable for touring as well as for downhill skiing and can be converted accordingly. According to a preferred embodiment of this known sole holding device, a thru-axle is provided in lateral bearing blocks, under which the front edge of the sole of the ski boot is pushed during downhill skiing, the thru-axle serving as a sole hold-down and for touring through both the bearing holes in the bearing blocks and through a bearing hole is introduced in the ski boot sole. A disadvantage of this configuration is on the one hand the fact that the thru axle can be lost as a loose part when converting the binding from touring to downhill and vice versa. Furthermore, the bearing hole in the ski boot can be offset by snow and ice, so that it is difficult to pass the thru axle through this bearing hole. Finally, in difficult terrain, it can be tedious to keep the ski boot above the ski surface at such a distance that the bearing holes in the bearing blocks and the bearing hole in the sole of the boot are aligned in order to be able to insert the thru axle.

A ski binding is already known (US Pat. No. 4,392,666), in which a change in the front sole holding device when changing from touring to downhill skiing is not necessary because the front support bearing remains in the same position in relation to the ski boot for both types of use, but this binding requires a separate fitting on the sole of the boot. This comprises a base body screwed to the sole of the boot and two lateral resilient holders which cooperate with an axle held on a bearing block, the axle being rounded at its ends and the cold pan-like recesses for receiving these ends. As a result, the ski boot is kept at a distance from the ski surface, so that touring is possible. The disadvantage here, however, is the fact that special fittings associated with the binding are necessary on the boot, which make the use of the ski boot without a ski, ie unsuitable for walking in the field. Even for short distances, additional protection is required for these binding parts arranged on the ski boot, which in turn means that there are loose parts.

The last-described problem does not exist with another known ski binding (DE-OS 22 31 058), because there are no fitting parts left permanently on the shoe, but there the ski boot is firmly connected to an additional plate by means of a pivot axis extending through the sole of the boot, which has a recess in the front area to allow the boot to pivot relative to this additional plate. This additional plate is clamped in the jaws of a conventional downhill binding, it being possible for the ski boots to be fixed in the heel area in relation to this additional plate for downhill skiing. The disadvantage of this configuration is how this is also the case with the known binding described at the outset that a thru-axle must be passed through the sole of the boot, which poses the problems with such a thru-axle explained at the outset.

The object of the invention is to design a sole holding device of the type described at the outset in such a way that it can be easily switched from touring to downhill skiing, has no loose parts and is insensitive to icing.

This object is achieved on the basis of a sole holding device according to the preamble of claim 1 in that the support bearing supports the ski boot for touring from below, the ski boot can be placed on the support bearing from above and that a tensioning device can be pivoted on the ski connected part is mounted, which engages from above on the protruding sole edge and clamps the ski boot on the support bearing in a positive or frictional manner.

This configuration has the particular advantage that for touring the ski boots are simply placed on the support bearing and clamped by the tensioning device. As a result, the ski boot for touring can be fixed in a particularly simple manner on the ski without loose parts having to be inserted into a bearing hole, since in the invention the ski boot is only placed on the support bearing and is clamped there by means of a simple tensioning device. This configuration is also insensitive to snow and ice influences and can easily be used for downhill skiing for which there are several options, which are explained below.

Basically, a particularly simple design can be selected for the downhill run if the support bearing is so far away from the ski surface that it overlaps the protruding sole edge in the downhill position. This eliminates the need for an additional sole hold-down for the downhill position.

A simple and reliable and easy-to-use configuration results in a further development of the invention in that the tensioning device is designed as a double-armed tensioning lever which is pivotably mounted by means of tension struts which are articulated on the tensioner and are attached to the ski in an articulated manner and has a pressure piece at one of its free ends, which in the touring position presses on the upper edge of the sole, the point of contact of the pressure piece on the sole being outside the plane of the tension struts on the side facing away from the ski boot. This is a simple tensioning lever, which is in its over-center position in the tensioned position.

If the support bearing is designed as a straight shaft, which is held in lateral bearing blocks, there is a particularly simple way of using this sole holding device for downhill skiing is that the sole edge is simply pushed under the shaft and the ski boot is held in this position by the rear sole holding device is. The distance between the shaft and the ski surface is chosen so that the front Sole edge, the height of which is usually standardized, fits under the shaft.

So that the ski boot is not too far from the ski surface in the touring position, the distance between the shaft and the ski surface can be adjustable.

To ensure that the ski boot does not collide with the rear sole holding device in the touring position or to ensure that in the touring position in which the ski boot is firmly connected to the front sole holding device, the ski boot cannot additionally be fixed by the rear sole holding device in a further embodiment of the invention, the shaft can be kept adjustable in the longitudinal direction of the ski.

In the down position, the boot can also be held in a different way. According to a particularly advantageous embodiment of the invention, the tensioning lever can carry at its other free end opposite the pressure piece a sole hold-down adapted to the sole of the boot, which cooperates with the edge of the sole in the downward position, the tensioning lever in the downward position being lockable against swiveling up by a locking device.

Instead of the adjustability of a straight shaft, in order to achieve the smallest possible distance of the boot sole to the ski surface in the touring position and to shift the ski boot in the touring position in the longitudinal direction in order to get it free from the rear sole holding device, the support bearing as a U-shaped shaft can also be attached to the free ends of the legs to the outside bent bearing journals are formed, which are rotatably mounted in lateral bearing blocks.

In this U-shaped or cranked shaft, in the downwardly pivoted position of the ski boots, there is only the distance from the ski surface that is necessary for the ski boot to be freely pivotable in the touring position. For the downward position, this U-shaped shaft is pivoted upwards, whereby there are again various options for holding the boot in the downward position.

A first possibility is that in connection with a tensioning lever, which has a sole hold-down device, the tensioning lever for the downward position can be pivoted under the support bearing, which serves as a locking device and that the end of the tensioning lever carrying the pressure piece is supported on the ski. This possibility of using the double-armed tensioning lever also exists in the configuration with the straight shaft, which is either so far away from the ski surface that the tensioning lever can be pivoted under the shaft, or that the shaft is adjustable in the vertical direction.

In order to be able to adjust the height of the sole hold-down device in an advantageous manner, in a further embodiment of the invention, the end of the tension lever carrying the pressure piece can be supported in the downward position on a height-adjustable stop arranged on the ski.

The U-shaped shaft can also be used with a simple tensioning lever that only has the pressure piece at one end for tightening in the touring position, are used if, in a further embodiment of the invention, the base part of the U-shaped shaft is bent in an S-shape in the plane lying parallel to the ski surface, the central region being swung up in the region used for downhill skiing Position of the curve of the toe above the toe is adjusted. In this embodiment, the support bearing designed as a U-shaped shaft itself serves as a sole hold-down in the downhill position.

So that the prying lever in its function as a sole hold-down always comes into the same position in the downward position in which the sole hold-down formed at one end is at a certain distance from the ski surface, it is provided in a further embodiment of the invention that on the arm holding the sole hold-down Strammer lever a control surface is formed, on which the underside of the support bearing rests and which is designed to rise in the direction pointing away from the ski boot.

A simplified configuration of the sole holding device results from the fact that the tension struts of the tension lever engage the support bearing, as a result of which an additional bearing for the tension struts is avoided if the support bearing is designed to be pivotable, which is particularly advantageous. In the case of a pivotable configuration of the support bearing, the support bearing moves when the boot is swiveled up and down while touring in bearings in bearing blocks, which results in a particularly low frictional resistance for the swivel movement. Of course that could also Support bearing to be arranged rigidly. In this case, the rolling motion of the boot when touring would cause friction between the boot sole and the support bearing, which leads to higher coefficients of friction unless special precautions are taken.

In order to limit the pivoting position of the tensioning lever in the tensioned position, cooperating stops for limiting the over-center position of the tensioning lever can advantageously be provided on the support bearing and on the tensioning lever.

If, in a further embodiment of the invention, a control cam is arranged on the pivot axis of the tensioning lever, which cooperates with a pressure piece guided in the tensioning lever, it is ensured that the tensioning lever always reaches its predetermined open position after it has been opened, in which the insertion of the ski boot does not is disturbed.

It is not absolutely necessary that the support bearing extends over the entire width of the sole of the boot. Rather, it is possible according to another embodiment of the invention that the support bearing comprises two coaxially opposite pins held on lateral bearing blocks.

If, in a further embodiment of the invention, the pins have downward bends towards the ski surface, this is advantageous for fixing the tensioning lever in its downward position if, in a further embodiment of the invention, the tensioning lever in the vicinity of the end holding the sole hold-down device has two lateral, just has recesses extending over part of the thickness of the tensioning lever, into which the pins engage with their bends in the downward position of the tensioning lever and serve as a locking device for the latter. The formation of the pegs with bends also leads to an improved positive connection between the latter and the boot sole in the touring position if, as will be explained in more detail below, this is provided with corresponding recesses in which these pegs engage.

In order to ensure that the boot is held securely in spite of the simple manner of fastening the boot on the support bearing, the boot sole can advantageously have a recess which is open at the bottom and is adapted to the support bearing for the positive connection of ski boots and support bearing.

A particularly advantageous embodiment results in connection with the U-shaped shaft in that for the positive connection of ski boots and sole holding device, the sole of the boot has continuous recesses in the laterally projecting edges perpendicular to the surface of the sole, which have the lateral legs of the U-shaped shaft are adjusted. This also enables a trouble-free entry into the binding, even if the recesses should be clogged with snow and ice, since by fitting the boot, these continuously open recesses are pressed free by the lateral legs of the U-shaped shaft.

These positive connections naturally set one appropriately trained ski boots ahead. If this is not available, the support bearing can be designed as a pivotably mounted tread plate for the frictional connection of the ski boot and sole holding device, which protrudes on both sides in the longitudinal direction of the ski, with the part directed towards the end of the ski protruding far beyond the part directed towards the ski tip over the pivot axis. This division of the protrusions is expedient in order to be able to pivot the tension lever with its arm supporting the sole holder for the downhill position under the tread plate.

If the support bearing comprises two pins which are located coaxially opposite one another, the boot sole in the laterally projecting edges can have downwardly open recesses adapted to the pin in order to achieve a positive connection between ski boots and support bearing. In this embodiment, the pins are supported in the recesses, which are closed at the top, and prevent the boot from shifting in the longitudinal direction of the ski and also from twisting relative to the ski. This possibility of rotation is also prevented in an advantageous manner by the other positive connections explained above.

Fig. 1 :

eine Seitenansicht einer Touren- und Abfahrtsbindung in der Tourenstellung;

Fig. 2 :

diese Bindung in der Abfahrtsstellung;

Fig. 3 :

eine Einzeldarstellung der vorderen Sohlenhaltevorrichtung der Bindung nach Fig. 1 in der Tourenstellung;

Fig. 4 :

die Sohlenhaltevorrichtung nach Fig. 3 in der Abfahrtsstellung;

Fig. 5 :

eine weitere Ausführungsform einer vorderen Sohlenhaltevorrichtung in der geöffneten Lage;

Fig. 6 :

die vordere Sohlenhaltevorrichtung nach Fig. 5 in der Tourenstellung;

Fig. 7 :

eine Draufsicht auf die Sohlenhaltevorrichtung nach Fig. 6;

Fig. 8 :

eine Draufsicht auf den vorderen Bereich des in Fig. 7 gehaltenen Skistiefels;

Fig. 9 :

eine teilweise geschnittene Seitenansicht der vorderen Sohlenhaltevorrichtung nach Fig. 5 in der Abfahrtsstellung;

Fig. 10 :

eine Vorderansicht der Sohlenhaltevorrichtung nach Fig. 9;

Fig. 11 :

eine Draufsicht auf die Sohlenhaltevorrichtung nach Fig. 9;

Fig. 12 :

eine weitere Ausführungsform einer vorderen Sohlenhaltevorrichtung in der Tourenstellung;

Fig. 13 :

eine Draufsicht auf die Sohlenhaltevorrichtung nach Fig. 12, bei der ein Bindungsteil weggelassen ist;

Fig. 14 :

eine Seitenansicht der vorderen Sohlenhaltevorrichtung nach Fig. 12 in der Abfahrtsstellung;

Fig. 15 :

eine Draufsicht auf die Sohlenhaltevorrichtung nach Fig. 14 bei der ein Bindungsteil weggelassen ist;

Fig. 16 :

eine weitere Ausführungsform einer vorderen Sohlenhaltevorrichtung in der Tourenstellung;

Fig. 17 :

eine Seitenansicht dieser Sohlenhaltevorrichtung in der Abfahrtsstellung;

Fig. 18 :

eine weitere Ausführungsform einer Sohlenhaltevorrichtung in Seitenansicht in der Tourenstellung;

Fig. 19 :

eine Seitenansicht der Bindung nach Fig. 18 in der Abfahrtsstellung;

Fig. 20 :

eine weitere Ausgestaltung einer vorderen Sohlenhaltevorrichtung in der Tourenstellung;

Fig. 21 :

die Sohlenhaltevorrichtung nach Fig. 20 in der Abfahrtsstellung;

Fig. 22 :

eine weitere Ausgestaltung einer vorderen Sohlenhaltevorrichtung in der Tourenstellung;

Fig. 23 :

die Sohlenhaltevorrichtung nach Fig. 22 in der Abfahrtsstellung;

Fig. 24 :

eine Draufsicht auf die Sohlenhaltevorrichtung nach Fig. 23; und

Fig. 25 :

ein Teilansicht in Richtung des Pfeiles XXV in Fig. 22..

The invention is explained below using several exemplary embodiments. The drawing shows:

Fig. 1:

a side view of a touring and downhill binding in the touring position;

Fig. 2:

this binding in the downhill position;

Fig. 3:

a detailed view of the front sole holding device of the binding of Figure 1 in the touring position.

Fig. 4:

the sole holding device of Figure 3 in the downhill position.

Fig. 5:

a further embodiment of a front sole holding device in the open position;

Fig. 6:

the front sole holding device of Figure 5 in the touring position.

Fig. 7:

a plan view of the sole holding device of FIG. 6;

Fig. 8:

a plan view of the front region of the ski boot held in Fig. 7;

Fig. 9:

a partially sectioned side view of the front sole holding device of Figure 5 in the downhill position.

Fig. 10:

a front view of the sole holding device of FIG. 9;

Fig. 11:

a plan view of the sole holding device of FIG. 9;

Fig. 12:

a further embodiment of a front sole holding device in the touring position;

Fig. 13:

a plan view of the sole holding device of Figure 12, in which a binding part is omitted.

Fig. 14:

a side view of the front sole holding device of Figure 12 in the downhill position.

Fig. 15:

a plan view of the sole holding device of Figure 14 with a binding part is omitted.

Fig. 16:

a further embodiment of a front sole holding device in the touring position;

Fig. 17:

a side view of this sole holding device in the downhill position;

Fig. 18:

a further embodiment of a sole holding device in side view in the touring position;

Fig. 19:

a side view of the binding of Figure 18 in the downhill position.

Fig. 20:

a further embodiment of a front sole holding device in the touring position;

Fig. 21:

the sole holding device of Figure 20 in the downhill position.

Fig. 22:

a further embodiment of a front sole holding device in the touring position;

Fig. 23:

22 in the down position;

Fig. 24:

a plan view of the sole holding device of FIG. 23; and

Fig. 25:

a partial view in the direction of arrow XXV in Fig. 22 ..

A complete ski binding is shown in FIGS. 1 and 2, which consists of a front sole holding device, generally designated 1, and a rear sole retaining device, generally designated 2. The rear sole holding device 2 comprises a releasable slide 4, which is guided in a ski-fixed holder 3 transversely to the longitudinal direction of the ski and on which a pivotable bracket 5 is mounted, which carries a sole clamp 6 serving for vertical release and which is pivotably mounted on the bracket 5. Such a sole holding device is known and is therefore not explained in more detail.

The front sole holding device, designated overall by 1, represents a first embodiment which is shown on a larger scale in FIGS. 3 and 4 and comprises two lateral bearing blocks 7 arranged on the ski face, on which two tension struts 8 are held, which can be rotated with one in the Bearing blocks connected shaft are connected, which serves as a support bearing 13 for the sole of the boot in the touring position. The tension struts form the legs of a U-shaped bracket 34, the base part of which serves as a bearing axis 36 for a two-armed tensioning lever 9. The tensioning lever 9 is is provided at one end with a pressure piece 10, which is adapted to the curve of the boot tip and presses in the touring position on the top of a boot sole 11 projecting forward. The opposite free end of the double-arm tension lever is provided with a cranked sole retainer 12 which is adapted to the front boot area and which holds the sole edge 11 in the downhill position shown in FIG. 2 against lifting off the ski.

In the touring position shown in FIGS. 1 and 3, the tensioning lever 9 is in an over-center position, in which the support point 15 is located outside the plane delimited by the tension struts 8. So that the tensioning lever 9 does not pivot further against the shoe, stops 16 and 17 are arranged on the tension struts 8 and on the tensioning lever 9, which limit the pivoting movement in the direction of the ski boot 14. To open the tension lever, a certain resistance must be overcome until the dead center is reached.

For the downhill run, the tensioning lever is pivoted under the support bearing 13 with its end carrying the sole hold-down 12. In order on the one hand to pivot the tensioning lever under the support bearing and on the other hand to be able to use the end as a sole hold-down device, this end is bent twice, the first turn being designated 18 and the second turn being 19. As a result, the sole hold-down device 12 has the necessary distance from the ski surface so that the sole edge 11 can be pushed under the sole hold-down device 12 in the downward position. In this position the boot is held by the rear sole holder 2 held, which allows both a lateral and a vertical release, whereby the front sole holding device need not have a release function. The end of the tension lever 9 provided with the pressure piece 10 is supported in the downward position on a height-adjustable stop which is arranged on the ski, as a result of which the distance between the sole hold-down device 12 and the ski surface can be adjusted. Swiveling up the tensioning lever in the downward position about the axis 36, about which the tensioning lever 9 is rotatably mounted, is avoided in that the tensioning lever 9 is supported from below against the support bearing 13.

So that the boot in the touring position, in which it rests with the sole 11 in the front toe area on the support bearing 13, is secured against displacement or entanglement against the longitudinal axis of the ski, the bottom of the boot has a downwardly open recess 22 which corresponds to the support bearing 13 designed as a shaft is adapted. The tension struts 8 are made in two parts, one part 21a assigned to the tensioning lever 9 being provided with a threaded piece 23 and the other part 21b assigned to the support bearing 13 being provided with a union nut 24 in order to be able to adjust the length of these tension struts 8. A compression spring 26 is provided in the bore lever in a bore 25, which is supported against a pressure piece 27 projecting from the bore, which cooperates with a control cam 28 which is arranged on the pivot axis 36 of the tension lever. The control cam 28 is designed such that it holds the tensioning lever 8 in the open position in a pivot position as far away from the boot as possible in connection with the pressure piece 27 in order to prevent this Do not hinder getting into the binding, ie in order not to impair the insertion of the recess 22 provided in the sole of the boot on the support bearing 13. After closing the tension lever, the ski boot is in the touring position. In this position, the ski boot 14 can be pivoted when touring, since it has the necessary distance from the ski surface due to the support bearing 13, the pivoting movement of the ski boot being supported by the rotatability of the support bearing.

FIGS. 5 to 11 show a further embodiment of a front sole holding device. The basic structure of the tensioning lever corresponds to that according to the embodiment of FIGS. 1 to 4, so that matching parts are provided with the same reference numerals.

The most important difference compared to the embodiment according to Figures 1 to 4 is that the support bearing designated 29 is designed as a U-shaped shaft which has a base part 30, two lateral legs 31 and at the ends of the legs pivot pin 32 bent outwards which are pivotally mounted in lateral bearing blocks 33. Due to this cranked configuration of the support bearing 29, the boot can be held at a smaller distance from the ski surface, since the support bearing, which also serves as a locking device for the tensioning lever 9 in the downward position, can be pivoted upward, as can be seen particularly in FIG. 9 . This creates the necessary distance to be able to pivot the tensioning lever under the support bearing.

Because of the large distance between the support bearing and the ski in the upwardly pivoted position, it is also possible to design the sole hold-down device without an offset and thus more easily.

In this embodiment, the tension struts 8 of the bracket, generally designated 34, are arranged in an articulated manner by means of pivot bearings 35 on the legs 31 of the support bearing 29, the base part 36 of the bracket, generally designated 34, forming the pivot axis for the tensioning lever 9.

In the open position, which is shown in FIG. 5, the tensioning lever 9 is held by the interaction of the pressure piece 27 and the control cam 28 in order not to hinder the entry into the binding.

In the touring position shown in FIGS. 6 and 7, the ski boot rests with the sole on the base part 30 of the support bearing 29, with continuous recesses 38 formed therein extending perpendicular to the boot sole cooperating with the side legs 31 of the support bearing 29 in such a way that these legs engage in the recesses 38 and thus bring about a form fit between the boot sole and the support bearing, as a result of which longitudinal displacement and entanglement of the boot with respect to the ski is not possible with the exception of the relative movement which the boot executes together with the support bearing 29 when it is pivoted if the boot is raised when touring, as can be seen from the comparison of FIGS. 5 and 6. When the boot is pivoted, the U-shaped support bearing is pivoted backwards towards the rear end of the ski. The is in the tour position Tension lever 9 in its dead center position, as has already been described in connection with FIGS. 1 to 4. The recesses 38 are continuously open, so that any snow which may be pressed into them is pushed upwards by the side legs 31 when entering the binding. As a result, problems from icing of the recesses 38 cannot arise.

For the downhill position, the boot rests on a ski-fixed sliding strip 39 in its front region and is held from above by the tensioning lever 9, which has a sole hold-down device 40 at one end, which is integrally formed and is adapted to the boot shape. In this position, the prying lever 9 is located under the support bearing 29, which is pivoted upwards, in order to interact with a control surface 41 on the prying lever 9, which is designed to rise obliquely forward in the direction of the ski tip, so that the pivotable support bearing 29 is in can set a certain position, which ensures that the distance between the sole hold-down device 40 and the ski surface always assumes a constant value. So that the tensioning lever 9 is fixed in its central position, 30 centering lugs 42 are provided on the base part, which prevent lateral movement of the tensioning lever 9 on its pivot axis 36.

FIGS. 12 to 15 show a further modification of the front sole holding device. In this embodiment, the base part 30 'of the support bearing 29' is bent in the plane parallel to the ski surface in an S-shape, so that it can serve as a hold-down device in the pivoted-up position according to FIG. 14, the Shape of this base part of the shoe shape above the protruding sole edge 11 is adapted. In this embodiment, the tensioning lever 9 'is only provided with the pressure piece 10 at one end and thus only serves to hold the ski boot in the touring position, as can be seen from FIG. 12. Here, too, the lateral legs 31 of the support bearing 29 'engage in the lateral recesses 38 of the boot sole 11. The boot sole rests on the base part 30' of the support bearing 29 ', as can be seen from FIGS. 12 and 13. In the downhill position, the sole of the boot is pushed under the base part 30 'of the support bearing 29' and, as shown in FIG. 2, the boot is pressed from behind by the sole holding device 2 against the support bearing 29 'which serves as sole hold-down device in the pivoted-up position. The adaptation of the support bearing to the boot shape is shown in FIG. 15. In this position the tension lever 9 'is placed on the ski in front of the boot. For this, reference is made to FIG. 14. The support bearing 29 'corresponds to the support bearing 29 according to FIGS. 2 to 11 except for the S-shaped shape of the base part 30' and is also supported.

While in the previous embodiments a positive connection was made between the boot sole and the support bearing in order to be able to hold the boot securely in the touring position, an embodiment is shown in FIGS. 16 and 17 in which the boot is held on the support bearing in a frictionally locking manner. In this embodiment, the support bearing is designed as a pivotably mounted tread plate 42, which is mounted in bearing blocks 44 by means of a pivot axis 43. The tread plate 42 stands over the pivot axis 43 in the longitudinal direction of the ski protrudes on both sides, the protruding part 45 being made much shorter than the protruding part 46. The tensioning lever 9 is designed in the same way as in the embodiment according to FIGS. 1 to 4. In the touring position according to FIG. 16, the boot sole rests on the tread plate 42, which has a covering with a very high coefficient of friction, so that the boot is sufficiently held by the static friction in conjunction with the contact pressure exerted by the tensioning lever. In the downward position according to FIG. 17, the tensioning lever 9 is pivoted down below the pivot axis 43, the tread plate being pivoted forward and resting on the upper side of the tensioning lever with its support surface for the boot. Otherwise, the configuration and mounting of the tension lever 9 corresponds to the embodiment according to FIGS. 1 to 4.

18 and 19, an embodiment is shown in which the support bearing and the arrangement of the same corresponds to that in FIGS. 1 to 4, which, however, with a simple, only a pressure piece 10 having tension lever 9 'according to the embodiment according to the 12 to 15 is combined. The tensioning lever 9 'thus only serves to hold the boot on the support bearing designed as a straight, continuous shaft 13 and is placed forward on the ski for the downward position, which is shown in FIG. 19. For the downhill position, the support bearing 13 serves as a sole hold-down device since this is at a distance from the ski surface which corresponds to the distance from the upper edge of the sole to the ski surface, so that the sole 11 can be pushed under the support bearing 13 for the downhill position.

In the embodiments shown in FIGS. 20 and 21, a support bearing 13 designed as a straight shaft is provided, which, like the embodiment according to FIGS. 1 to 4, is rotatably and adjustably held in lateral bearing blocks 47, this support bearing being in a slot guide 48 from a lower position, in which it serves as a support for the touring position, can be moved into an upper position, in which the support bearing serves as a sole hold-down device, in such a way that the protruding edge of the sole 11 can be pushed under the support bearing 13 designed as a shaft, as shown in Fig. 21. A simple tensioning lever 9 'serves as the tensioning lever, as is used in the embodiment according to FIGS. 12 to 15 or 19 and 20 and has a pressure piece 10 only at one end. In order to hold the support bearing 13 in the respective position despite the slot guide 48, i.e. In order to prevent displacement of the support bearing due to the forces occurring during touring or downhill skiing, a rotary slide valve 50 pivotably mounted on the bearing block 47 by means of a bearing 49 is provided, which is pivoted against the support bearing in the respective end positions of the support bearing 13 and thus its displacement blocked.

A further embodiment is shown in FIGS. 22 to 25, in which the support bearing is not in one piece but in the form of two coaxially oriented pins 51 with bends 52 directed downwards, ie in the direction of the ski surface. These pegs 51 engage with their bends 52 in lateral recesses 53 in the soleplate 11, the recesses being open at the bottom and not over the entire height of the soleplate extend so that the closed rest of the boot sole can rest on the pin 51, the bends 52 in the recesses 53 serving for better lateral stabilization of the boot sole.

The prying lever 9 corresponds essentially to the prying lever 9 according to FIGS. 1 to 4, but has recesses 54 in its two side surfaces, into which the pins 51 engage with their bends 52 in the waiting position, as can be seen from FIG. 23. Since the recesses 54 are not continuous, the remaining wall part 55 forms a stop for the bends 52, so that the tensioning lever 9 is held in the downward position and cannot deflect upwards when forces are directed upward.

Claims (22)

1. Front sole holding device, which can be used optionally for cross-country and downhill skiing and can be employed in conjunction with a ski boot, which boot comprises, in its forward toe region, a sole projecting beyond the ski boot, the ski boot being connected for cross-country only to the front sole holding device which holds it by means of a support bearing at a distance from the ski surface and pivotal about an axis transverse to the longitudinal axis of the ski, and wherein the ski boot for downhill skiing is pressed releasably by a rear sole holding device against the front sole holding device, the support bearing accepting the upwardly directed forces on the projecting sole, characterized in that the support bearing (13, 30, 30', 42, 51) supports the ski boot for cross-country from beneath, the ski boot being able to be placed from above onto the support bearing, and that a clamping device (9, 9') is pivotally journalled on a component (13, 29, 29', 43, 49) connected to the ski, which clamping device engages onto the projecting sole edge from above and firmly clamps the ski boot onto the support bearing form-fittingly (22, 25) or by friction (46).
2. Front sole holding device according to Claim 1, characterized in that the support bearing (13, 30, 30', 51) is at a sufficiently large distance from the ski surface for it to engage over the projecting sole edge (11) in the dowhill skiing position.
3. Front sole holding device according to Claim 1 or 2, characterized in that the clamping device is constructed as a two-armed tightening lever (9, 9'), which is pivotally journalled by means of tie bars (8), acting in articulated manner on the tightening lever and journalled in articulated manner on the ski, and possesses, at one of its free ends, a pressure piece (10) which in the cross-country position presses on the upper sole edge (11), the bearing point (15) of the pressure piece (10) on the sole (11) being situated outside the plane of the tie bars (8) at the side remote from the ski boot (14).
4. Front sole holding device according to one of Claims 1 to 3, characterized in that the support bearing (13) is constructed as a rectilinear shaft, which is held in lateral bearing blocks (7, 33, 47).
5. Front sole holding device according to Claim 4, characterized in that the distance of the shaft (13) from the ski surface is adjustable.
6. Front sole holding device according to Claim 4 or 5, characterized in that the shaft (13) is held adjustable in the longitudinal direction of the ski.
7. Front sole holding device according to one of Claims 1 to 6, characterized in that the tightening lever (9) possesses, at its other free end remote from the pressure piece (10), a sole holding-down device (12) adapted to the boot sole (11), which cooperates with the sole edge (11) in the downhill position, and that the tightening lever (9) can be blocked in the downhill position against pivoting upwards by a blocking device.
8. Front sole holding device according to one of Claims 1 or 7, characterized in that the support bearing (29, 29') is constructed as a U-shape shaft having, at the free ends of its arms, outwardly bent bearing journals (33), which are rotatably journalled in lateral bearing blocks (33).
9. Front sole holding device according to one of Claims 4 to 8, characterized in that the tightening lever (9) is pivotal for the downhill position beneath the support bearing (13, 29, 42), which serves as blocking device, and that the end of the tightening lever carrying the pressure piece bears against the ski.
10. Front sole holding device according to Claim 9, characterized in that the end of the tightening lever (9) carrying the pressure piece (10) can bear in the downhill position against a stop (20), mounted adjustable in height on the ski.
11. Front sole holding device according to Claim 8 in conjunction with Claims 1 to 3, characterized in that the base part (30') of the U-shape shaft is curved, in the plane lying parallel to the ski surface, to an S-shape, the middle region, when in the upward pivoted position serving for downhill skiing, being adapted to the curvature of the toe of the boot above the boot sole (11).
12. Front sole holding device according to Claim 9, especially in conjunction with Claim 8, characterized in that on the arm carrying the sole holding-down device (12) a cam surface (41) is formed, upon which the lower side of the support bearing (29) rests and which is shaped to ascend in the direction pointing away from the ski boot.
13. Front sole holding device according to one of Claims 3 to 12, characterized in that the tie bars (8) of the tightening lever (9) act upon the support bearing (13, 29, 29', 43, 49).
14. Front sole holding device according to Claim 13, characterized in that cooperating stops (16, 17) are provided on the tie bars (8) and on the tightening lever (9) for limiting the beyond dead-centre position of the tightening lever (9).
15. Front sole holding device according to one of Claims 3 to 14, characterized in that on the pivoting axis (36) of the tightening lever (9, 9') a control cam (28) is disposed, which cooperates with a pressure piece (27) guided in sprung manner in the tightening lever (9).
16. Front sole holding device according to one of Claims 1 to 3, 7, 9, 10 or 12 to 15, characterized in that the support bearing possesses two mutually coaxial and opposed journals, held in lateral bearing blocks.
17. Front sole holding device according to Claim 16, characterized in that the journals (51) possess bent zones (52) orientated downwards towards the ski surface.
18. Front sole holding device according to Claim 17, especially in conjunction with one of Claims 7, 9 or 10, characterized in that the tightening lever (9) comprises, in the vicinity of the end carrying the sole holding-down device, two lateral recesses (54) extending only through a portion of the thickness of the tightening lever, into which recesses the journals (51) with their bent zones (52) engage in the downhill skiing position of the tightening lever (9) and act as blocking device for the latter.
19. Front sole holding device according to one of Claims 1 to 17, characterized in that, for the form-fitting connection of ski boot and sole holding device, the boot sole (11) comprises a downwardly open recess (22) adapted to the support bearing (13).
20. Front sole holding device according to Claim 8 or one of the succeeding Claims 9 to 16, characterized in that, for the form-fitting connection of ski boot and sole holding device, the boot sole (11) possesses, in the lateral, projecting edges (11), continuous recesses (38) orientated perpendicularly to the sole surface, which are adapted to the lateral arms (31) of the U-shaped shaft.
21. Front sole holding device according to one of Claims 1 to 3, 7, 9, 10 or 12 to 15, characterized in that, for the frictional connection of ski boot and sole holding device, the support bearing (42) is constructed as a pivotally journalled tread plate, which projects in the ski longitudinal direction beyond its pivot axis (43) on both sides, the part (46) orientated towards the end of the ski projecting beyond the pivot axis (43) considerably further than the part (45) directed towards the toe of the ski.
22. Front sole holding device according to Claim 15 or 17, characterized in that, for the form-fitting connection of ski boot and sole holding device, the boot sole possesses, in the laterally projecting edges (11), downwardly open recesses (53) adapted to the journals (51).

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